1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24
25/* <DESC>
26 * Send email with IMAP
27 * </DESC>
28 */
29
30#include <stdio.h>
31#include <string.h>
32#include <curl/curl.h>
33
34/* This is a simple example showing how to send mail using libcurl's IMAP
35 * capabilities.
36 *
37 * Note that this example requires libcurl 7.30.0 or above.
38 */
39
40#define FROM    "<sender@example.org>"
41#define TO      "<addressee@example.net>"
42#define CC      "<info@example.org>"
43
44static const char *payload_text =
45  "Date: Mon, 29 Nov 2010 21:54:29 +1100\r\n"
46  "To: " TO "\r\n"
47  "From: " FROM "(Example User)\r\n"
48  "Cc: " CC "(Another example User)\r\n"
49  "Message-ID: "
50  "<dcd7cb36-11db-487a-9f3a-e652a9458efd@rfcpedant.example.org>\r\n"
51  "Subject: IMAP example message\r\n"
52  "\r\n" /* empty line to divide headers from body, see RFC 5322 */
53  "The body of the message starts here.\r\n"
54  "\r\n"
55  "It could be a lot of lines, could be MIME encoded, whatever.\r\n"
56  "Check RFC 5322.\r\n";
57
58struct upload_status {
59  size_t bytes_read;
60};
61
62static size_t payload_source(char *ptr, size_t size, size_t nmemb, void *userp)
63{
64  struct upload_status *upload_ctx = (struct upload_status *)userp;
65  const char *data;
66  size_t room = size * nmemb;
67
68  if((size == 0) || (nmemb == 0) || ((size*nmemb) < 1)) {
69    return 0;
70  }
71
72  data = &payload_text[upload_ctx->bytes_read];
73
74  if(*data) {
75    size_t len = strlen(data);
76    if(room < len)
77      len = room;
78    memcpy(ptr, data, len);
79    upload_ctx->bytes_read += len;
80
81    return len;
82  }
83
84  return 0;
85}
86
87int main(void)
88{
89  CURL *curl;
90  CURLcode res = CURLE_OK;
91
92  curl = curl_easy_init();
93  if(curl) {
94    size_t filesize;
95    long infilesize = LONG_MAX;
96    struct upload_status upload_ctx = { 0 };
97
98    /* Set username and password */
99    curl_easy_setopt(curl, CURLOPT_USERNAME, "user");
100    curl_easy_setopt(curl, CURLOPT_PASSWORD, "secret");
101
102    /* This will create a new message in folder "Sent". */
103    curl_easy_setopt(curl, CURLOPT_URL, "imap://imap.example.com/Sent");
104
105    /* In this case, we are using a callback function to specify the data. You
106     * could just use the CURLOPT_READDATA option to specify a FILE pointer to
107     * read from. */
108    curl_easy_setopt(curl, CURLOPT_READFUNCTION, payload_source);
109    curl_easy_setopt(curl, CURLOPT_READDATA, &upload_ctx);
110    curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
111
112    filesize = strlen(payload_text);
113    if(filesize <= LONG_MAX)
114      infilesize = (long)filesize;
115    curl_easy_setopt(curl, CURLOPT_INFILESIZE, infilesize);
116
117    /* Perform the append */
118    res = curl_easy_perform(curl);
119
120    /* Check for errors */
121    if(res != CURLE_OK)
122      fprintf(stderr, "curl_easy_perform() failed: %s\n",
123              curl_easy_strerror(res));
124
125    /* Always cleanup */
126    curl_easy_cleanup(curl);
127  }
128
129  return (int)res;
130}
131